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geiten tstes @anni @ffice VlTIIiLIAM A. PARMELE, OF NEW HAVEN,CONNECTICUT.

Letters Patent No. 67,345, dated July 30, 1867.

IMPROVEMENT IN BLOWERS.

TO A-LL WHOM IT MAY CONCERN:

Be it known that I, VILLIAM A. PARMELE, of New Haven, in the county ofNew Haven, and State of Connecticut, have invented a new and usefulImprovement in Fan-Blowers; and I do hereby declare that the followingis a full, clear, and exact description of the same, referencebeing hadto the annexed drawings,

lmaking part of this specification, in which- Figure l is an endelevation.

Figure 2 is a. side elevation'in part.

Figure 3 is a plan of the bottom of the fans.-

Figure is a. vertical transverse section.

ln all the figures the same letters are employed for the designation ofparts which are identical.

Aisthe .bottom plate, which is constructed with openings A, over whichare pla-ced the flap-valves B, which permit the air to pass upwardsthrough the plate, but will not allow it to escape downwards. The bottomplate also contains proper bearings for the fan-shafts C C. The fans D Dare rectangular plates attached to the shafts C and C, having openingsD, through which the air may pass upwardly under the flap-valves E,which prevent the air from passing in the reverse direction. The uppercasing is composed of two plates, F and F1. The plate F extends over theentire semicircle, but not with a curve of uniform radins, that ofnearly a quadrant being less than the remainder, which has a longerradius. The plate F1 has a curve of the same radius as the shorter oneabove mentioned, and itis also alittle less than a quadrant, so as toleave a passage, F2, for

the air between the plates, as shown in lig. 4. This air-passage iscontracted to form a nozzle at F3. The fans' D oscillate within theupper plates F and Fl, the ends being in near proximity to, but nottouching the plates. An oscillatory motion is communicated to the fans Dby the revolution of the pulley G, which is driven by a belt. Acrank-pin, G', projects from the side of the pulley to which theconnecting rods H H' are attached. These connecting rods arerespectively attached by wrist-pins to the arms I and I. The revolutionof the pulley gives a reciprocating motion to the connecting rods, andthey communicate an oscillatoryr motion to the arms I I. The shaft isformed in two Aparts C Cf. One of the fans is attached to the part C,the other to the part C. The latter is tubular, and the end of the shaftC (between the arm and its middle) is turned sinn-lier to pass throughthe tubular portion C. The collar to which the arm I is attached isfastened to the end of the shaft C; the arm I is, in like manner,attached to the tubular portion of the shaft C. A-s the arms I I aredrawn upwards by the motion of the pulley, the fans will in like mannerbe raised, and the air will ilow in through the valves B, lling thespace behind and below the fans;l the air which is in front and abovethe fans will be forced through the passage Ff. As the fans oscillatedownwards the valves E will be opened te allow the air to escape throughthem to the upper side of the fans, and the valves B will be closed.

What I claim as my invention, and desire to secure by Letters Patent,is-

1. The oscillating fans D with valves E, in combination with the bottomplate A, with valves B and case F F1, forming an air-passage, F2, saidparts being respectively constructed and arranged substantially as setforth.

2. The fans D attached to the shafts C U', in combination with the armsI I', connecting rods H H, and pulley G, and arranged to operatesubstantially as set forth.

In testimony whereof I have signed my name to thisv specification in thepresence of two subscribing witnesses.

WM. A. PARMELE.

Witnesses:

CHRISTIAN Srnnir, M. Lyons.

